Results 21 to 30 of about 248,368 (367)

Yolk sac, but not hematopoietic stem cell–derived progenitors, sustain erythropoiesis throughout murine embryonic life

Journal of Experimental Medicine, 2021
Yolk sac erythropoiesis is not replaced by hematopoietic stem cell–derived progeny up until birth. Yolk sac–derived erythroid progenitors require 10-fold lower concentrations of erythropoietin for differentiation, which confers a competitive advantage ...
F. Soares-da-Silva, L. Freyer, R. Elsaid, O. Burlen-Defranoux, L. Iturri, O. Sismeiro, P. Pinto-do-Ó, E. Gomez-Perdiguero, A. Cumano   +8 more
semanticscholar   +1 more source

Modeling human yolk sac hematopoiesis with pluripotent stem cells

Journal of Experimental Medicine, 2021
Specific populations of immune cells in the adult develop from the embryonic yolk sac, independent of hematopoietic stem cells. Using the human pluripotent stem cell model, this study has mapped human yolk sac hematopoiesis, providing access to these ...
Michael H Atkins, Rebecca Scarfò, K. McGrath, Donghe Yang, J. Palis, Andrea Ditadi, G. Keller   +6 more
semanticscholar   +1 more source

SMARCB1 (INI-1)-Deficient Adenocarcinoma of the Sinonasal Tract: A Potentially Under-Recognized form of Sinonasal Adenocarcinoma with Occasional Yolk Sac Tumor-Like Features

Head and Neck Pathology, 2019
Akeesha A. Shah, Deepali Jain, Emad Ababneh, Abbas Agaimy, Aaron P. Hoschar, Christopher C. Griffith, Kelly R. Magliocca, Bruce M. Wenig, Lisa M. Rooper, Justin A. Bishop   +9 more
openalex   +3 more sources

An in vitro stem cell model of human epiblast and yolk sac interaction

eLife, 2021
Human embryogenesis entails complex signalling interactions between embryonic and extra-embryonic cells. However, how extra-embryonic cells direct morphogenesis within the human embryo remains largely unknown due to a lack of relevant stem cell models ...
K. Mackinlay, Bailey A. T. Weatherbee, Viviane Souza Rosa, C. Handford, George Hudson, Tim Coorens, L. Pereira, S. Behjati, L. Vallier, M. Shahbazi, M. Zernicka-Goetz   +10 more
semanticscholar   +1 more source

Visceral endoderm expression of Yin-Yang1 (YY1) is required for VEGFA maintenance and yolk sac development. [PDF]

PLoS ONE, 2013
Mouse embryos lacking the polycomb group gene member Yin-Yang1 (YY1) die during the peri-implantation stage. To assess the post-gastrulation role of YY1, a conditional knock-out (cKO) strategy was used to delete YY1 from the visceral endoderm of the yolk
Siyeon Rhee, Mara-Isel Guerrero-Zayas, Mary C Wallingford, Pablo Ortiz-Pineda, Jesse Mager, Kimberly D Tremblay   +5 more
doaj   +1 more source

Change of zinc mobilization and gene expression of key zinc transport proteins between the yolk sac membrane and liver of duck embryonic developing

Poultry Science, 2022
: Zinc (Zn) deposition in egg yolk is essential for the rapid growth and complete development of the avian embryo. Thus, it is crucial to obtain maximal Zn mobilization at an appropriate time during development in favor of the survival of avian embryos ...
S.P. Bai, W. Gao, T. Yuan, X.Y. Ma, L.J. He, L. Huang, S. Wei, C. Liu, W.C. Wang, L. Yang, Y.W. Zhu   +10 more
doaj   +1 more source

Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies

Scientific Reports, 2023
This longitudinal study investigated the impact of actigraphy-measured maternal physical activity on yolk sac size during early development. The yolk sac, a transient extraembryonic organ, plays a crucial role in embryonic development and is involved in ...
Alexander Vietheer, Torvid Kiserud, Cathrine Ebbing, Hemamaalini Rajkumar, Øystein Ariansen Haaland, Rolv Terje Lie, Roberto Romero, Jörg Kessler   +7 more
doaj   +1 more source

Pediatric Ovarian Yolk Sac Tumor Mimicking Appendicitis: A Case Report From a Low-Resource Setting. [PDF]

Clin Case Rep
Nkenguye W, Mremi A, Minja P, Lodhia J.
europepmc   +2 more sources

Primary Nasopharngeal Yolk Sac Tumor: A Case Report [PDF]

Journal of Clinical and Diagnostic Research, 2016
Yolk sac tumour also known as primitive endodermal tumour is the most common malignant germ cell tumour (GCT) in the paediatric age group. Most common sites of involvement are ovaries and testes, but rarely can occur in the extragonadal sites.
Dhanalakshmi Arumugam, Pavithra Thandavarayan, Lalitha Chidambaram, Sudha Boj, Sumathi Marudasalam   +4 more
doaj   +1 more source

Pure primary yolk sac tumor of the endometrium tends to occur at a younger age: A case report and literature analysis

SAGE Open Medical Case Reports, 2021
We present a case of primary yolk sac tumor of the endometrium. This rare tumor occurred in a 43-year-old woman with a pure primary yolk sac tumor. The tumor resembled yolk sac tumor morphology of the ovary.
Huijuan Ge, Rui Bi
doaj   +1 more source